Anterior Cruciate Ligament (ACL) Reconstruction and Gait


  • To monitor cartilage thinning of both ACL reconstructed and healthy contralateral knees over time using MR imaging and segmentation techniques.
  • To study gait changes in ACL reconstructed patients 2 and 4 years post-surgery.

Major Findings

  • ACL reconstructed (ACL-R) subjects displayed an external tibial rotational offset throughout stance phase of walking at 2 years post-surgery, which could explain the increased risk for osteoarthritis (OA) in this patient population.
  • At two years post operation:
    • ACL-R patients have adopted a reduced knee adduction moment when compared to their contralateral, non-injured limb, while walking and ascending and descending stairs.
    • In stair ascent and descent, ACL-R patients' contralateral knees have greater overall total knee joint moments (1st peak) when compared to matched control (uninjured) subjects.
      • Indicates possible compensatory change in ACL-R patients, where the contralateral knee has greater loading maybe due to the lower loading of the ACL-R knee.
      • Lower moments in the ACL-R knees also suggest that joint loading might not be the initiating factor for OA in the ACL-R population. The pathway to OA in this population may be initiated by kinematic or biological changes.
Three knee moments for ACL-R reconstructed, ACL-R contralateral, and control subjects for gait, stair ascent, and stair descent.
  • ACL reconstructed knees display lower torsional stiffness in internal tibial rotation.
Rotational stiffness protocol and plot

Representative Publications

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